*Club domestic league appearances and goals, correct as of 23:05, 2 December 2024 (UTC) ‡ National team caps and goals, correct as of 18:20, 10 September 2024 (UTC)
Born in Dragør, Hey switched to Lyngby Boldklub in the summer of 2019, after playing for Dragør Boldklub, AB Tårnby and the newly established club A27. After a year and a half in the youth ranks with strong performances, Hey made his professional debut for Lyngby on 24 May 2021 against Vejle Boldklub in the Danish Superliga.[1][2] Hey continued his success in the youth teams and was rewarded in January 2022 with a permanent promotion to the first team squad and a contract extension until the summer of 2024.[3][4]
Lyngby was promoted back to the Danish Superliga for the 2022–23 season and it was in this season that Hey would get his big breakthrough, where he became a regular in the Lyngby team.[5]
Nordsjælland
On 6 August 2023, it was confirmed that Hey had joined fellow league club FC Nordsjælland, signing a deal until the end of 2027.[6]